"The problem of supporting millions of lines of Ada code is of critical importance to the DoD and the missile defense community. The decline in the use of Ada has led to a fall in the supply of trained personnel, and a reduction in vendor tool support. Asmigration to a new language is usually technically and economically infeasible, programs such as THAAD are left with a huge legacy code problem. A common problem with such systems is how to make modifications so as to adapt them to changing requirementsin a way that poses little risk to the integrity of the code. We propose a tool based on refactoring --- the disciplined transformation of code to improve its design while retaining its essential semantics. The system will be based on our existinglanguage-sensitive editing technology, integrated with ASIS --- a standard for retrieving semantic information about Ada programs. The prospects for commercial success are excellent, as our initial market research indicates demand. We will exploit ourexisting Ada tools customer base to market the proposed tool to DoD contractors and beyond. The software we propose to develop will reduce the cost of the development and support of legacy Ada code by helping to increase the productivity of programmers.The software will have application in many industries, including defense, aerospace, and for other security and safety-critical applications that use Ada."